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从二维轴对称Navier-Stokes方程出发,利用有限体积法,对抛物线型面空速管在马赫数Ma≤1.5的气动特性进行了数值计算。并通过试验对比验证了模型和数值计算方法的正确性。给出了不同长细比下抛物线型面的补偿特性,建立了不同马赫数下补偿量与长细比之间的具体关系。结果表明,抛物线型面空速管对机头位置误差具有良好的补偿特性,且补偿量随型面段长细比的增大而减小。
Based on the two-dimensional axisymmetric Navier-Stokes equations, the finite volume method is used to calculate the aerodynamic characteristics of a parabolic surface-toothed tube at a Mach number of Ma≤1.5. The correctness of the model and the numerical calculation method are verified through experimental comparison. The compensation characteristics of parabolic profile under different slenderness ratios are given, and the relationship between the compensation amount and the slenderness ratio under different Mach numbers is established. The results show that the parabolic surface-toothed tube has a good compensation for the nose position error, and the compensation amount decreases with the slenderness ratio of the section.